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HURRICANE LENNY INTERMEDIATE ADVISORY NUMBER 17A
NATIONAL WEATHER SERVICE MIAMI FL
1 PM AST WED NOV 17 1999
 
...LENNY REACHES 140 MPH WINDS AND STRENGTHENING...ALL PREPARATIONS
AGAINST THIS EXTREMELY DANGEROUS HURRICANE SHOULD BE COMPLETED.... 

A HURRICANE WARNING REMAINS IN EFFECT FOR PUERTO RICO AND THE U.S.
AND BRITISH VIRGIN ISLANDS.  A HURRICANE WARNING IS ALSO IN EFFECT
FOR DUTCH ST. MAARTEN...FRENCH ST. MARTIN...ST. BARTHELEMEY...
ANGUILLA...SABA...ST. EUSTATIUS...ST. KITTS...NEVIS...MONTSERRAT...
ANTIGUA...AND BARBUDA.

THE HURRICANE WARNING FOR MAINLAND PUERTO RICO...NOT INCLUDING
VIEQUES AND CULEBRA...MAY BE DOWNGRADED LATER TODAY IF THE HURRICANE
CONTINUES ON A NORTHEAST TRACK.
 
AT 1 PM AST...1700Z...THE EYE OF HURRICANE LENNY WAS LOCATED BY
PLANE AND RADAR NEAR LATITUDE 17.2 NORTH...LONGITUDE  64.8 WEST
OR ABOUT 35 MILES...55 KM...SOUTH OF ST. CROIX.
 
LENNY IS MOVING TOWARD THE NORTHEAST NEAR 12 MPH...19 KM/HR OR A
LITTLE BIT SLOWER.  ON THIS TRACK...THE CORE OF POWERFUL HURRICANE
LENNY WILL BE CROSSING THE WARNING AREA LATER TODAY.  WEATHER
CONDITIONS WILL CONTINUE TO WORSEN OVER THE WARNING AREA.

MAXIMUM SUSTAINED WINDS HAVE INCREASED TO NEAR 140 MPH...225 KM/HR
...WITH HIGHER GUSTS ESPECIALLY OVER UNPROTECTED SOUTH AND WEST
FACING HARBORS.  LENNY IS A DANGEROUS CATEGORY 4 HURRICANE ON THE
SAFFIR/SIMPSON HURRICANE SCALE. STRONGER WINDS COULD BE EXPERIENCED
IN MOUNTAINOUS AREAS.  SOME FLUCTUATIONS IN INTENSITY ARE EXPECTED
DURING THE NEXT 24 HOURS.
 
HURRICANE FORCE WINDS EXTEND OUTWARD UP TO  60 MILES... 95 KM...
FROM THE CENTER...AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP
TO 175 MILES...280 KM.  ST. CROIX JUST REPORTED A GUST TO 88 MPH
...140 KPH. 
 
A RECONNAISSANCE PLANE JUST ESTIMATED A MINIMUM CENTRAL PRESSURE
OF 933 MB...27.55 INCHES.
 
RAINFALL TOTALS OF 10 TO 15 INCHES...WITH LOCALLY HIGHER AMOUNTS IN
MOUNTAINOUS REGIONS ARE ASSOCIATED WITH THE HURRICANE.  THESE RAINS
CAN PRODUCE LIFE-THREATENING FLASH FLOODS AND MUD SLIDES.  SAN JUAN
DOPPLER RADAR SHOWS HEAVY RAINS CONTINUING TO SPREAD OVER PORTIONS
OF PUERTO RICO...THE VIRGIN ISLANDS...AND THE NORTHERN LEEWARD
ISLANDS.
 
ISOLATED TORNADOES ARE POSSIBLE OVER THE WARNING AREA.
 
STORM SURGE FLOODING OF 5 TO 8 FT ABOVE NORMAL...ACCOMPANIED BY
LARGE AND DANGEROUS BATTERING WAVES...IS EXPECTED NEAR THE CENTER IN
THE WARNED AREA.
 
REPEATING THE 1 PM AST POSITION...17.2 N... 64.8 W.  MOVEMENT
TOWARD...NORTHEAST NEAR 12 MPH.  MAXIMUM SUSTAINED WINDS...140 MPH. 
MINIMUM CENTRAL PRESSURE...933 MB.
 
THE NEXT INTERMEDIATE ADVISORY WILL BE ISSUED BY THE NATIONAL
HURRICANE CENTER AT 3 PM AST FOLLOWED BY THE NEXT COMPLETE
ADVISORY AT 5 PM AST.
 
AVILA
 
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